... College of Economics, Vietnam National University, Ha Noi CENTRE FOR ECONOMIC AND POLICY RESEARCH COLLEGE OF ECONOMICS, VIETNAM NATIONAL UNIVERSITY HANOI ... are presented in (3.1a) and (3.1b). Output-Oriented BCC Primal (BCCP – O) Output-Oriented BCC Dual (BCCD – O) 00(1 1 ). .0,,1 1,, , , 0,0 ( )T ToTMax Z s ss tY y sX ... research in terms of input. Three levels of input are considered as ones less than 100 million Vietnam Dong (VND), from 100 million VND to 300 million VND, and greater than 300 million VND. We first...